o filename -> открывает файл filename, не сохраняя изменения в текущем файле

mvc/models.py

@@ -139,6 +139,13 @@ class VimModel:
                     self.currentLine += self.displayLinesCount
                 else:
                     self.currentLine = len(self.displayBuffer) - 1
+            case _:
+                # Открывает файл
+                if len(cmd) > 2 and cmd[:2] == 'o ':
+                    filename = cmd[2:]
+                    self.LoadFile(filename)
+                    return ReturnCode.SET_BASIC_MODE
+                
 
         return ReturnCode.GOOD
 
@@ -201,10 +208,13 @@ class VimModel:
 
     def LoadFile(self, file_path) -> None:
         """Загрузка файла для редактирования"""
+        self.Reset()
         self.file_path = file_path
+        self.mode = "NORMAL"
         try:
             with open(file_path, "r") as file:
                 self.displayBuffer = [list(line.rstrip('\n')) for line in file.readlines()]
+                
         except FileNotFoundError:
             print(f"File {file_path} not found. Starting with empty buffer.")
             self.displayBuffer = []
@@ -218,3 +228,14 @@ class VimModel:
             print(f"File {self.file_path} saved successfully.")
         except Exception as e:
             print(f"Error saving file: {str(e)}")
+
+    def Reset(self) -> None:
+        self.displayBuffer = []
+        self.currentLine = 0
+        self.currentCol = 0
+        self.scrollY = 0
+        self.scrollX = 0
+        self.file_path = ""
+        self.mode = ""
+        self.commandBuffer = []
+        self.exchangeBuffer = []